Williston Basin Interstate Pipeline Co.

Second Revised Volume No. 1

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Effective Date: 02/01/2000, Docket: RP00-165-000, Status: Effective

Fifth Revised Sheet No. 344 Fifth Revised Sheet No. 344 : Effective

Superseding: Fourth Revised Sheet No. 344

GENERAL TERMS AND CONDITIONS (Continued)

39. TRANSITION COST RECOVERY MECHANISMS (Continued)

39.3.1 Determination of Account No. 191 Surcharge -

Shippers served under Transporter's previously effective

Rate Schedules G-1 and SGS-1, contained in Transporter's

canceled FERC Gas Tariff, First Revised Volume No. 1, as of

May 18, 1992 (Applicable Shippers) shall be required to

reimburse Transporter for any underrecovery balances and

Transporter shall be required to refund to such Applicable

Shippers any overrecovery balances accrued in Transporter's

Account No. 191 associated with Transporter's natural gas

purchases during the period August 1, 1991 until Transporter

terminates the Purchased Gas Cost Adjustment Provision found

in Section 21 of the General Terms and Conditions of

Transporter's FERC Gas Tariff, First Revised Volume No. 1

and/or as a result of out of period billing adjustments

(received by Transporter within nine (9) calendar months

after the date Transporter terminates the effectiveness of

its Purchased Gas Cost Adjustment Provision) related to gas

purchases prior to such termination. Such termination of

Transporter's Purchased Gas Cost Adjustment shall be

effective upon the date this Tariff first becomes effective.

Out of period billing refunds received by Transporter after

the nine (9) calendar months following the termination of

Transporter's Purchased Gas Cost Adjustment Provision shall

be treated in accordance with the provisions of subsection

39.3.1.1.1 hereof.

39.3.1.1 To the extent that the FERC Account No. 191

balance referenced above reflects an overrecovery of

purchased gas costs, Transporter shall refund to each

of the Applicable Shippers its proportionate share of

such balance in one lump sum, with interest calculated

in accordance with Section 154.501 of the FERC's

Regulations. Such refund shall be made to the

Applicable Shippers within sixty (60) days of the date

that Transporter terminates the effectiveness of its

Purchased Gas Cost Adjustment Provision and a Refund

Report shall be filed with FERC. Such refund amounts

shall be set forth on Sheet No. 358I